Paul, you missed part of the picture. Suppose we have a different
kernel, which does not have the same bug as Linux has,and that,
further, depends on that register being visible? We can't know that
such OSes exist, but we do not know that they do not. We'd have to at
the very least test some of them. We've always tried to avoid being
Linux-centric in coreboot and for the most part have succeeded.
Further, hidden registers create their own problems.
This problem has no clear solution. I've always felt that in all
cases, we should err on the side of opening up the hardware, and not
hiding registers.
ron